db: Set the Queued Tracks playlist as active when adding tracks

I do this unconditionally, so even if the track is already on the
playlist we set it as active. I think this is what the user would
expect, but I'm open to revising this approach later.

Fixes: #62 ("Queueing tracks doesn't activate the Queued Tracks playlist")
Signed-off-by: Anna Schumaker <Anna@NoWheyCreamery.com>

emmental/db/playlists.py

@@ -113,6 +113,9 @@ class Table(playlist.Table):
             case self.previous:
                 self.add_system_track(playlist, track)
                 return True
+            case self.queued:
+                self.sql.set_active_playlist(playlist)
+                return self.add_user_track(playlist, track)
             case self.unplayed: return track.playcount == 0
             case _: return self.add_user_track(playlist, track)
 

tests/db/test_playlists.py

@@ -615,6 +615,11 @@ class TestSystemPlaylists(tests.util.TestCase):
                         self.table.queued.propertyid).fetchall()
         self.assertEqual(len(rows), 1)
         self.assertEqual(rows[0]["trackid"], self.track.trackid)
+        self.assertEqual(self.sql.active_playlist, self.table.queued)
+
+        self.sql.set_active_playlist(self.table.collection)
+        self.table.queued.add_track(self.track)
+        self.assertEqual(self.sql.active_playlist, self.table.queued)
 
         self.library.deleting = True
         self.table.queued.reload_tracks()